Epidemiological and Bacteriological Investigation of Enterohemorrhagic <I>Escherichia coli</I> Infection in the Chugoku-Shikoku Area

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  • 中・四国地区における腸管出血性大腸菌感染症の疫学的解析と分離菌株の細菌学的検討
  • チュウ シコク チク ニ オケル チョウカン シュッケツセイ ダイチョウキン カンセンショウ ノ エキガクテキ カイセキ ト ブンリ キンカブ ノ サイキンガクテキ ケントウ
  • Epidemiological and Bacteriological Investigation of Enterohemorrhagic Escherichia coli Infection in the Chugoku-Shikoku Area

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Abstract

We investigated the occurring tendency of enterohemorrhagic Escherichia coli (EHEC) infection in the prefectural and municipal public health institutes in the Chugoku-Shikoku area from 1996 to 1999, and the bacteriological characteristics of EHEC isolated from these cases. Consequently, epidemiological analysis of the EHEC infection in this district was performed.<BR>22 outbreaks in the various facilities showed the tendency occurred in infants andaged groups, and the serotypes of EHEC isolated from these outbreaks were O26, O111 etc. as well as O157. In 4 cases, EHEC were isolated from specimens of buckwheat noodles, salad, sand box, and goat feces, and these were determined as the source of infection.<BR>In 898 sporadic cases, including familial infection, the EHEC isolates were classified into 24 serotypes, and the genotypes of EHEC O157: H7 isolates by pulsed-field gel electrophoresis (PFGE) also varied. Moreover, since many asymptomatic carriers were detected in the adult group with familial infection, the existence of healthy carriers is as important as the source of infection.<BR>The drug-resistance test of EHEC isolates showed that 24% of the 924 isolates wereresistant to drugs.

Journal

  • Kansenshogaku Zasshi

    Kansenshogaku Zasshi 76 (6), 439-449, 2002

    The Japanese Association for Infectious Diseases

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